let·ter-per·fect
adjective/ˌletə ˈpɜːfɪkt/
/ˌletər ˈpɜːrfɪkt/
(North American English)- correct in all details
准确无误的；一字不差的；无讹的 - (British English word-perfect)able to remember and repeat something exactly without making any mistakes
能背得一字不差的；能背得滚瓜烂熟的